Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Thu Mar 5 19:49:31 2026 Auto Mode Machine = Linux oleg338-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg338-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 9028 16351 177207 258159 64 8 14038 31265 344233 348253 64 16 13843 43213 489126 725882 64 32 14763 86737 681644 457452 64 64 14669 87301 1330167 809014 128 4 11625 17084 158612 204148 128 8 19931 35794 306992 284539 128 16 24105 55531 539674 425141 128 32 25000 83328 1185654 528517 128 64 31993 114402 1007629 841746 128 128 27269 133889 831319 1885042 256 4 15932 16326 211582 168752 256 8 16993 29337 256274 220852 256 16 30910 61987 433869 675391 256 32 35178 66875 694167 569079 256 64 25762 89264 1040643 1219045 256 128 43440 143571 1354356 1237306 256 256 52383 105789 1325925 1673001 512 4 14767 16422 172685 167971 512 8 26636 32894 345265 366226 512 16 39844 61714 724081 453936 512 32 44386 76499 669247 596058 512 64 53255 112901 963945 1127995 512 128 53866 149621 1500891 1634551 512 256 63312 147382 1668848 1350783 512 512 55956 153800 2073249 2796910 1024 4 15584 18600 163264 190829 1024 8 23847 29034 286430 308152 1024 16 42235 56686 586119 591935 1024 32 55522 85885 992182 797608 1024 64 75300 131080 1440391 826462 1024 128 86862 154496 1410125 1378002 1024 256 78648 110224 1607514 1612342 1024 512 69673 175284 1793451 2016600 2048 4 16390 19061 180503 207773 2048 8 30145 37243 348408 351890 2048 16 46481 61258 580487 528390 2048 32 67052 99344 958825 660012 2048 64 70409 117275 1275264 900242 2048 128 75070 163226 1685356 1303518 2048 256 102291 151266 2015562 1754908 2048 512 96973 189227 1923059 2221454 4096 4 18471 18273 129109 182529 4096 8 29313 34472 296404 311982 4096 16 45795 59435 506305 560631 4096 32 63257 88021 641691 727257 4096 64 97181 117495 1359940 864491 4096 128 106477 141003 1341987 1187619 4096 256 118135 166085 1892721 1684167 4096 512 128056 147950 1820517 1528892 8192 4 18794 19448 187215 177569 8192 8 28832 31187 335037 329539 8192 16 50425 52530 566256 429487 8192 32 71702 86993 903590 898157 8192 64 88415 115232 1273016 1164784 8192 128 102895 117860 1523253 1295381 8192 256 93822 122526 1491903 1159360 8192 512 109309 140168 2001405 1549214 16384 4 17207 17871 205058 178208 16384 8 29505 33163 350459 351920 16384 16 55635 58220 684546 562132 16384 32 68371 81764 815324 781722 16384 64 92124 113946 1009129 904741 16384 128 96984 124022 1560252 1309471 16384 256 113968 120727 1677811 1318111 16384 512 94375 117850 1702080 1558306 32768 4 16932 19423 192200 175098 32768 8 30741 33449 344216 279306 32768 16 45957 52111 546142 446857 32768 32 62616 79873 743951 718361 32768 64 75809 98151 1086905 1018082 32768 128 87544 111346 1304200 1146090 32768 256 97269 148667 1846285 1665224 32768 512 98734 139324 1742229 1495367 65536 4 18585 20156 185054 202518 65536 8